Lunchbox



FIG. 1 is a top, front, left side isometric view of a lunchbox showing my new design;

FIG. 2 is an isometric view thereof in an open position;

FIG. 3 is a rear elevational view thereof; and

FIG. 4 is a bottom plan view thereof.

The other end is substantially identical to the end illustrated. 

The ornamental design for a lunchbox, as shown and described. 